As the lenses of the Rift S ( and possibly also the other VR headsets) get scratched easily by someone wearing glasses it would be nice to sell replacement lenses. I know they are "not removable by the user", but i'm sure there are a lot of company's who can specialize in doing this for us. Also there will be a lot of users who have the skills to replace the lenses and don't care if that makes the warranty invalid. Having a scratch free set of lenses is more important than the limited warranty as I see it.